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adding custom-columns examples

This commit is contained in:
Jim Angel 2020-04-19 19:37:04 -05:00
parent 50cb2a03c8
commit 11ac6b9e13
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content/en/docs/reference/kubectl/cheatsheet.md
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@ -351,6 +351,21 @@ Output format | Description
`-o=wide` | Output in the plain-text format with any additional information, and for pods, the node name is included
`-o=yaml` | Output a YAML formatted API object
Examples using `-o=custom-columns`:
```bash
# All images running in a cluster
kubectl get pods -A -o=custom-columns='DATA:spec.containers[*].image'
# All images excluding "k8s.gcr.io/coredns:1.6.2"
kubectl get pods -A -o=custom-columns='DATA:spec.containers[?(@.image!="k8s.gcr.io/coredns:1.6.2")].image'
# All fields under metadata regardless of name
kubectl get pods -A -o=custom-columns='DATA:metadata.*'
```
More examples in the kubectl [reference documentation](/docs/reference/kubectl/overview/#custom-columns).
### Kubectl output verbosity and debugging
Kubectl verbosity is controlled with the `-v` or `--v` flags followed by an integer representing the log level. General Kubernetes logging conventions and the associated log levels are described [here](https://github.com/kubernetes/community/blob/master/contributors/devel/sig-instrumentation/logging.md).